Bimmerfest - BMW Forums - View Single Post - Cannot get the air out of the cooling system! Weird
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Old 11-20-2012, 05:40 PM
SFbay SFbay is offline
Account Under Review
Location: SF
Join Date: Mar 2012
Posts: 893
Mein Auto: BMW 745i
Well so far everything is good. System is air free!!!
Make sure your heater blows hot without aux pump connected. If its not than you've got air. Very serious problem which will kill your tranny, engine very quick! Why it gets air pockets?? Simple: aging plus some plug and play connections are not perfect.
Worst thing you cannot tell if you have air or not bc aux waterpump always keeps your heater hot even with air. Now my car has desert hot heater without any aux water pump( it's been dead). Coolant temp never gets warmer than 105 even with old fan clutch.))

Last edited by SFbay; 11-20-2012 at 05:44 PM.
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